Drive train with automatic transmission or an automatic transmission, an oil supply and a hydrodynamic retarder

摘要

The present invention relates to a drive train with automatic transmission or automated gearbox;1.1 with an oil supply, comprising an oil sump (1) and a pump device (3, 4) for providing a supply pressure p₀;1.2 with a hydrodynamic retarder (19), comprising a working space with an inlet (24) and an outlet (25), via which the retarder (19) with oil can be supplied from the oil circuit,1.3 with a pressure line (2, 12, 22, 32) for the pressurized oil supply of elements (17, 18, 20) of the transmission;1.5 with valves (8, 9) in the pressure line (2, 12, 22, 32),1.6 with a heat exchanger (33) in the pressure line (2, 12, 22, 32), in order to dissipate heat from oil which has been heated;1.7 with a retarder oil circuit (23) which, by means of a valve (8) in front of the heat exchanger (33) and a valve (9) behind the heat exchanger (33), can be connected to the latter.The drive train according to the invention is characterized in that, for regulation of the hydrodynamic retarder (19) valves (6, 7a, 7b, 8, 9, 27, 39, 40) and a filling line (26, 41) are provided, with the retarder oil circuit (23) via the filling line (26, 41) in such a manner with the pressure line (2, 12, 22, 32) is connectable, that a retarder expensive pressure p_R in the retarder oil circuit (23) is variably adjustable.